Sinus Perforation After Tooth Extraction: What To Watch For

Reviewed by Dr. Brent Boyse

Reading time: three minutes

A sinus perforation after tooth extraction happens when a small opening forms between an upper tooth extraction site and the maxillary sinus above it. This complication is most likely after removing upper molars, upper wisdom teeth, or some upper premolars, where the roots can sit very close to the sinus floor. In oral surgery, this is called an oroantral communication (OAC).

Table of Contents

• What Are The Symptoms Of Sinus Perforation After Tooth Extraction?
• How Common Is Sinus Perforation After Tooth Extraction?
• Treatment for Sinus Perforation
  • When the Opening Can Heal on Its Own
  • When Surgical Repair Is Needed
• CBCT-Guided Planning for Upper Tooth Extractions
• Oral Surgeon in Mesa, AZ
• FAQs

What Are The Symptoms Of Sinus Perforation After Tooth Extraction?

The most common symptoms involve air, liquid, or pressure moving between the mouth and sinus.

Watch for:

• Fluid coming through your nose when drinking
• A whistling or air-passing sound from the extraction site
• A feeling of air moving between your mouth and nose
• One-sided sinus pressure or cheek discomfort
• Nasal congestion that starts after the extraction
• A bad taste, drainage, or postnasal drip
• Pressure changes when speaking or breathing

If you have any of these symptoms, it’s worth following up with your surgeon.

How Common Is Sinus Perforation After Tooth Extraction?

Published reviews report oroantral communication after upper molar extraction in roughly 1.3% to 3.8% of cases, depending on the tooth position and the patient’s anatomy. The risk is highest with upper back teeth because their roots often sit very close to the maxillary sinus, and the sinus floor may be naturally thin. 

The risk is higher when:

• Roots sit inside or directly against the sinus floor
• The sinus floor is naturally thin
• There is bone loss from infection
• The tooth fractures during removal
• Surgical extraction is needed
• It involves upper second molars or wisdom teeth

At AZ Max Oral & Maxillofacial Surgeons, our surgeons take every precaution to carefully plan upper molar and wisdom tooth extractions, helping reduce the risk of sinus perforation and protect the surrounding sinus structures.

Treatment for Sinus Perforation

Treatment depends on the size of the opening, how long it has been present, and whether the sinus has become infected. Small sinus perforations may close on their own, while larger openings are more likely to need surgical repair.

When the Opening Can Heal on Its Own

Very small openings, often less than 2 mm, can sometimes heal naturally if the sinus is healthy and the blood clot remains stable. In these cases, protecting the area during early healing is important.

Patients are usually advised to avoid blowing the nose, smoking, using straws, forceful rinsing, and sneezing with the nose pinched shut. If sneezing cannot be avoided, it should be done with the mouth open to reduce pressure in the sinus and protect the healing site.

When Surgical Repair Is Needed

Openings larger than a few millimeters, persistent fluid leakage through the nose, air passing between the mouth and sinus, or symptoms that continue beyond the first day or two often require treatment from an oral surgeon.

Treatment may include suturing the tissue closed, placing a collagen plug or protective dressing, or performing a gum flap procedure to seal the communication. Imaging may also be used to evaluate the size of the opening and the condition of the sinus. If sinusitis is present, antibiotics, nasal care, and sometimes ENT involvement may be needed before or alongside surgical closure.

Prompt treatment is important because an untreated sinus perforation can develop into a chronic oroantral fistula, which is more difficult to close and increases the risk of ongoing sinus infection.

CBCT-Guided Planning for Upper Tooth Extractions

CBCT scans allow our surgeons to closely evaluate how upper molar and wisdom tooth roots relate to the maxillary sinus before surgery. This detailed view helps identify when roots sit close to the sinus floor, when bone is thin, or when a tooth may require a more careful surgical approach.

With this level of planning, our surgeons can take the right precautions to reduce the risk of sinus perforation, protect the sinus membrane, and support safer healing after extraction.

If a sinus communication does occur, early diagnosis and prompt treatment help prevent more complex surgical repair later. Our team manages both routine and higher-risk upper tooth extractions with a strong focus on precision, prevention, and long-term healing.

Oral Surgeon in Mesa, AZ

If you had a tooth extraction performed at one of our locations and have symptoms of sinus perforation or concerns about healing, contact our team for follow-up care. To book an appointment, call or text (480) 830-5866 or visit us at 6755 E Superstition Springs Blvd Suite 103, Mesa, AZ 85206.

📍Other locations

• AZ Max Oral Surgery in North Mesa
• AZ Max Oral Surgery in Tempe, AZ
• AZ Max Oral Surgery in Show Low
• AZ Max Oral Surgery in Queen Creek

FAQs